Response of Rotors Subjected to Random Support Excitations

[+] Author and Article Information
R. Subbiah, R. B. Bhat, T. S. Sankar

Department of Mechanical Engineering, Concordia University, Montreal, Quebec, Canada H3G 1M8

J. Vib., Acoust., Stress, and Reliab 107(4), 453-459 (Oct 01, 1985) (7 pages) doi:10.1115/1.3269287 History: Received June 11, 1985; Online November 23, 2009


Response of rotor systems subjected to random support excitations is studied. Support excitations may occur for rotating machines installed either on the ground due to earthquake motion, or on board moving systems such as ships. These excitations in general are random in nature and hence the response of the machine can be obtained following a statistical analysis. In this paper, the amplitude power spectral densities (PSD) due to random support excitations are obtained for rotor systems, using modal analysis methods. The excitations are assumed to be stationary and Gaussian with a white noise type of PSD. Excitations through different supports are assumed to be statistically independent so that their cross correlations are zero. Results for rotors with various parametric combinations are presented.

Copyright © 1985 by ASME
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